[KarlInOhio]

If you get a perfect score on one assignment and a 0 on the second one your average is 50% or an F. Interestingly, if you average grades on a 4.0 scale (A=4, B=3...) instead of percentages, taking the average of the A paper and the F paper will give you a C.

[Paladin2]

I really made out in HS by moving 3x, between numerical to grade to numerical GPA calculations.